How to Make It
Muddle peeled and sliced cucumber, fresh or thawed frozen green peas, fresh tarragon leaves, and a dash of kosher salt in a cocktail shaker. Add fresh lemon juice, vodka, St-Germain (elderflower liqueur), agave nectar, and ice; cover and shake 30 seconds. Strain into a coupe glass. Top with club soda. Garnish with additional tarragon, if desired.